Assume that 1. the hour and minute hands of a clock move without jerking. 2. the clock shows a time between 8 O'clock and 9 O'clock. 3. the two hands of the clock are one above the other. After how many minutes (nearest integer) will the two hands be again lying one above the other?

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Assume that 1. the hour and minute hands of a clock move without jerking. 2. the clock shows a time between 8 O'clock and 9 O'clock. 3. the two hands of the clock are one above the other. After how many minutes (nearest integer) will the two hands be again lying one above the other?